Lets say you have Jade, Cobalt and Amethyst - Now Jade and Cobalt is on the left, and Amethyst is on the right - Let one tank, tank 2 and one tank 1. And lets say you get Jade petrifacation, then get Jade + random together on either one of the tanks, on 50 energy change the random boss with the other boss so you have Jade on 50 energy and the new boss on 0 energy - this way your tanks can easily control when they are going to blow up. This is what we did and with this tac we used 5 trys (new guild)

From what I've heard the easiest way to deal with chains is to have both people chained to stand near each other and then when jade starts petrifying the two people spread and break the chains (15 stacks.)

From what I've heard the easiest way to deal with chains is to have both people chained to stand near each other and then when jade starts petrifying the two people spread and break the chains (15 stacks.)

Is that how you guys deal with it?

You want to do it on Jasper, but yes, that's the easiest way to handle it.